Jesse Liu (University of Chicago)
The tau anomalous magnetic moment g–2 strikingly evades experimental measurement, but its larger mass implies greater sensitivity to new physics than the muon counterpart, which reports a longstanding 3–4 sigma tension. Interestingly, the only two dimension-6 SMEFT operators that modify tau g–2 at tree-level involve Higgs–gauge–fermion couplings. We propose a new strategy using the LHC as a photon collider, low multiplicity triggers, and recent advances in soft lepton reconstruction to open new sensitivity beyond LEP to these SMEFT operators and BSM contributions to tau g–2.
Jesse Liu (University of Chicago) Lydia Audrey Beresford (University of Oxford (GB))